package com.xiaolun.condition;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

class ShareDate {
	//	标志位
	private int number = 1; //A:1；B:2；C:3；
	private Lock lock = new ReentrantLock();
	//一把锁配多把备用钥匙
	private Condition c1 = lock.newCondition();
	private Condition c2 = lock.newCondition();
	private Condition c3 = lock.newCondition();

	public void print5() {
		lock.lock();
		try {
			//1、判断
			while (number != 1) {
				//wait...
				c1.await();
			}
			//2、干活
			for (int i = 1; i <= 5; i++) {
				System.out.println(Thread.currentThread().getName() + "\t" + i);
			}
			//3、通知（永远要先改变标志位）
			number = 2;
			c2.signal(); //通知第二个
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			lock.unlock();
		}
	}

	public void print10() {
		lock.lock();
		try {
			//1、判断
			while (number != 2) {
				//wait...
				c2.await();
			}
			//2、干活
			for (int i = 1; i <= 10; i++) {
				System.out.println(Thread.currentThread().getName() + "\t" + i);
			}
			//3、通知（永远要先改变标志位）
			number = 3;
			c3.signal();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			lock.unlock();
		}
	}

	public void print15() {
		lock.lock();
		try {
			//1、判断
			while (number != 3) {
				//wait...
				c3.await();
			}
			//2、干活
			for (int i = 1; i <= 15; i++) {
				System.out.println(Thread.currentThread().getName() + "\t" + i);
			}
			//3、通知（永远要先改变标志位）
			number = 1;
			c1.signal();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			lock.unlock();
		}
	}
}

/**
 * @Description: 多线程之间按顺序调用，实现A->B->C
 * 三个线程启动，要求如下：
 * AA打印5次，BB打印10次，CC打印15次
 * 接着AA打印5次，BB打印10次，CC打印15次
 * 来10轮
 */
public class ConditionDemo01 {
	public static void main(String[] args) {
		ShareDate shareDate = new ShareDate();
		new Thread(() -> {
			for (int i = 1; i <= 10; i++) {
				shareDate.print5();
			}
		}, "A").start();
		new Thread(() -> {
			for (int i = 1; i <= 10; i++) {
				shareDate.print10();
			}
		}, "B").start();
		new Thread(() -> {
			for (int i = 1; i <= 10; i++) {
				shareDate.print15();
			}
		}, "C").start();
	}
}
